Kakashi would easily phase through Amaterasu, and thus Sasuke won't be able to hit him with the following counter attack. His only chance is to blitz Kakashi with his Rinnegan at the very second the match starts. If Kakashi can't react, he dies. If he can, he gets PS out and from there on out, Sasuke has no way to injure him, while Kakashi has long ranged Kamui, Shuriken, and he has PS itself.
this what will happen in all scenarios not just #1
after using the riningan teleportation,sasuke has to wait for some time to use it again ,alright?
so if sasuke couldnt finish kakashi by his first s/t usage ,he will surly lose in any scenario ,and that is why:
during sasuke’s s/t cool down ,sasuke has no answer for these techs even if sasuke has ps :
1.long range kamui fused with rikudo chakra
kakashi was able to warp kaguya’s bone and portal before naruto got closer 1cm to the bone, though both naruto and the bone was going toward each other
and the list of kamui speed feats goes on
sasuke cant evade kakashi’s kamui while his s/t is in the cool down period,even with his teleportation ,it is debatable if he can react to current kakashi’s kamui snipe or not
2.kamui raiki
i dont need to explain ,kamui raiki speed blitzed powered up kaguya while pre powered up kaguya who was low in chakra evaded sasuke using his s/t
so i dont see sasuke (during the cool down)evade something powered up kaguya couldnt evade
even with his teleportation ,it is debatable if he can react to kamui raiki or not
3.double kamui teleportation
exauhasted dms obito was able to sync his teleportation with kaguya’s teleportation which sasuke couldnt evade during the cool down time
he started warping himself,naruto’s clone and sakura after kaguya has fully entred her portal ,however he was able to warp himself,sakura and naruto’s clone before kaguya’s portal vanished ,something even naruto couldnt do twice
and it would have been even faster if obito had warped himself only and if he had been healthy
so it is safe to say that double kamui teleportation fused with rikudo chakra is at least as fast as kaguya’s teleportation which sasuke couldnt evade during his s/t cool down time
conclusion:during sasuke’s s/t cool down ,there are at least three ways for kakashi to beat sasuke
but the question is ,how would sasuke miss his first s/t usage ?
there 2 possible scenarios for the fight’s beginning ,either kakashi attacks sasuke with kamui snipe,kamui raiki or kamui teleportation ,then sasuke will avoid it with his s/t (though it is still debatable if he can react to kamui snipe and kamui raiki or not) ,so he will miss his s/t first usage and he will be beaten by one of the three ways i mentioned above
either that or sasuke starts the fight by attacking with his s/t (depends on the distance) ,then kakashi reacts to it and uses intangibility
kakashi can react to it ??!? yes i think so ,and even you wasnt sure if kakashi cant react to it
i think that you think that kakashi has a good chance to react to sasuke’s s/t ,seeing how kakashi reacted to powered up kaguya and speedblized her ,though pre powered up kaguya who was low in chakra could evade sasuke’s/t ,makes me think that kakashi can react to sasuke ’s s/t by his instant intangibility
that is how sasuke will miss his first s/t usage ,then he will be beaten by one of the three ways i mentioned above above
i wish you enjoyed my post